GG

Guochen Gao

OE Otis Elevator: 1 patents #88 of 253Top 35%
Overall (2021): #443,759 of 548,734Top 85%
1
Patents 2021

Issued Patents 2021

Patent #TitleCo-InventorsDate
10975927 Brake device for elevator and an elevator system Zixu Zhang, Ruguang Liu 2021-04-13